Implemented the Anthropic provider (#17)

app/MindWork AI Studio/Provider/Anthropic/ResponseStreamLine.cs

@@ -0,0 +1,17 @@
+// ReSharper disable NotAccessedPositionalProperty.Global
+namespace AIStudio.Provider.Anthropic;
+
+/// <summary>
+/// Represents a response stream line.
+/// </summary>
+/// <param name="Type">The type of the response line.</param>
+/// <param name="Index">The index of the response line.</param>
+/// <param name="Delta">The delta of the response line.</param>
+public readonly record struct ResponseStreamLine(string Type, int Index, Delta Delta);
+
+/// <summary>
+/// The delta object of a response line.
+/// </summary>
+/// <param name="Type">The type of the delta.</param>
+/// <param name="Text">The text of the delta.</param>
+public readonly record struct Delta(string Type, string Text);